Stethoscope Attachment for iPhone

*NOTE: this Thing is designed for printing on a MakerBot (accomodating for shrinkage, overhang, etc). For a more up-to-date, non-MakerBot version, see:
http://www.thingiverse.com/thing:149028*

A friction-fit cap for the bottom of the iPhone 4/5 that allows a stethoscope to be attached and recorded using the built-in microphone.

As the sound passes through the rubber stethoscope tubing, it is funneled directly to the mic at the bottom of the phone.

A quick test recording can be heard here:
http://soundcloud.com/jeffthompson/3d-printed-iphone-stethoscope